What is 'lift' in the context of drafting?

In the context of drafting, 'lift' refers specifically to the elevation difference between the static water source and the center of the pump. This measurement is crucial because it determines how much vertical distance the pump has to move the water uphill. When drafting from a static source, such as a pond or a tank, the height above the pump's inlet directly affects the ability of the pump to effectively draw water.

If the source of water is at a lower elevation than the pump, there is less lift to overcome, making it easier for the pump to operate efficiently. Understanding lift is essential for firefighters and engineers when determining if a pump can draft from a particular source, as exceeding the lift capacity may hinder the pump's ability to function correctly. Establishing this relationship between elevation and pump operation is fundamental in fire rescue scenarios, ensuring that the right decisions are made regarding water sourcing and supply operations.